Thanks for the link (by the way, that is an amazing colour scheme for the site…it suits it very well). Anyway, what you are seeing is the “Visited” colour. So when you click on a link, go to that page, then you will see it change showing that you had visited that page. Anyway, to change this, I will have to do an update to the theme and add a little piece of css to the theme so that it stays the colour the footer links you set.
As for the posts disappearing, hard to say, but there is something not compatible and it could be a plugin or something else. I just upgraded a local test site of mine with Celestial Reloaded and my blog posts are still showing. I will have to try an upgrade to the live demo to see what happens.
One of the dangers of WordPress and their “auto update” notices. They are great but also dangerous should someone suddenly click upgrade not realizing something in their site might not be compatible (yet). For me, I will always do a full backup first before I click update on themes, plugins, and WordPress. For anyone upgrading their WordPress, it shows this message in the dashboard:
Important: before updating, please back up your database and files. For help with updates, visit the Updating WordPress Codex page.